| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Gossé, S.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2018High temperature corrosion phenomena during a nuclear severe accident - The corium-concrete interaction
- 2018Thermodynamic Assessment of the Fe-Te System. Part I: Experimental studycitations
- 2017Thermodynamic investigation of the Cr-O-U and Cr-O-Zr systems
- 2017Thermodynamic modelling of key metallic sub-systems for the treatment of mid-level wastes
- 2017Thermodynamic modelling of key metallic sub-systems for the treatment of mid-level wastes
- 2017The TAF-ID database Application calculations to severe accidents and irradiated fuel
- 2016Experimental and thermodynamic calculations results on pwr and srf corium subsystems
- 2016Thermodynamic assessment of the PdRhRu system using calphad and first-principles methodscitations
- 2016High temperature experimental contribution to the thermodynamic modeling of corium pools
- 2016High temperature experimental contribution to the thermodynamic modeling of corium pools
- 2015Experimental investigation and thermodynamic modelling of the in-vessel corium for severe accident studies in PWR reactors
- 2015Experimental investigation and thermodynamic modelling of the in-vessel corium for severe accident studies in PWR reactors
- 2015Experimental study and thermodynamic modelling of corium mixtures Application to severe accidents in Pressurized Water Reactors
- 2015Modélisation thermodynamique de l'interaction entre le verre et les phases molybdates.
- 2012Mechanism of RuO2 Crystallization in Borosilicate Glass: An Original in Situ ESEM Approachcitations
- 2011Thermodynamic study of the uranium–vanadium systemcitations
Places of action
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document
High temperature experimental contribution to the thermodynamic modeling of corium pools
Abstract
During a severe accident in a Pressurized or Boiling Water nuclear reactor, extreme temperatures may be reached (T>2500 K). Under these conditions, the oxide fuel (UO2) may react with the Zircaloy cladding and with the steel vessel, forming a mixture of solid-liquid phases called in-vessel corium. In the worst scenario, this very high temperature mixture may pierce the vessel and spread on the concrete underneath the reactor to form an ex-vessel corium. New high temperature thermodynamic data are needed to better predict the high temperature behaviour of the corium+concrete system.To approach these very high temperature interactions between the fuel, the structural materials and the concrete, the LM2T at CEA Saclay Centre uses an approach combining the thermodynamic modeling of a chemical system representative of a simplified prototypic corium using the Calphad method (Al-Ca-Fe-Si-U-Zr-O) and the development of a specific high temperature setup dedicated to the measurement of phase equilibria at high temperature (up to 2400 K) on interesting corium sub-systems.To reach such high temperatures, this setup uses an aerodynamic levitation device and a CO2 laserheating technique that makes it possible to melt metallic or oxide samples at temperatures above3000 K. This technique avoids the interactions between the sample and the crucible and permits toobserve the formation of miscibility gaps that often forms in such high temperature liquids.In this framework, new phase equilibria data on the Fe-Zr-O system and on the Al-Ca-Si-Zr-Osystem were carried out. The thermal arrest measurements together with the composition andmicrostructure analyses will be presented for some metallic and oxide samples representative for invessel and ex-vessel samples. These experimental results will be compared to the thermodynamic calculations from the thermodynamic database under development.